rust compiler error

error.rs

use std::old_io as io;
use std::sync::mpsc::channel;
use std::thread::Thread;
use std::ops::Fn;
use std::marker::PhantomData;

pub struct Test<F, X>(F, PhantomData<X>);

impl <F, X> Test<F, X> where F: Fn(X) {
  fn go(self, x: X) {
    let Test(f, _) = self;
    f(x)
  }
}

fn main() {
  let (tx, rx) = channel();
  Thread::spawn(move|| {
    tx.send(Test(|x: isize| { println!("{:?}", x) }, PhantomData)).unwrap()
  });
  //println!("{:?}",
  rx.recv().unwrap().go(12);
}

/*
Global is external, but doesn't have external or weak linkage!
void (%closure*, i64)* @_ZN4main12closure.4347E
invalid linkage type for function declaration
void (%closure*, i64)* @_ZN4main12closure.4347E
LLVM ERROR: Broken module found, compilation aborted!
*/